TW284854B - Machine-vision illumination system and method - Google Patents
Machine-vision illumination system and methodInfo
- Publication number
- TW284854B TW284854B TW084112218A TW84112218A TW284854B TW 284854 B TW284854 B TW 284854B TW 084112218 A TW084112218 A TW 084112218A TW 84112218 A TW84112218 A TW 84112218A TW 284854 B TW284854 B TW 284854B
- Authority
- TW
- Taiwan
- Prior art keywords
- light
- focusing element
- provides
- present
- straight
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Stroboscope Apparatuses (AREA)
Abstract
The present invention takes advantage of the efficiency of high-brightness red, infra-red, or other color LEDs arranged in a single row, the properties inherent to a focusing element such as a cylindrical lens, as well as the advantages of having a straight-edged diaphragm and a light-absorbing enclosure to produce an illumination source for machine-vision systems. The illumination source exhibits multi-directional properties on one side of an imaginary plane defined by the positions of the row of LEDs, the straight-edged diaphragm, and the focusing element, and minimize light cast on the other side of the plane, The present invention provides a compact light line generator which has no shadowing or secondary lines. The present invention also provides a method for measuring the height of a raised surface. The present invention provides a method and apparatus which provide an illumination source for illuminating an object in a machine-vision system, and includes a light source emitting light from a plurality of points, the points being on a straight line, a focusing element, the focusing element focusing light from the light source in one dimension to a focal line, in which the focusing element is separated from the straight line by adistance sufficient to focus rays from the plurality of points into the focal line, and in which there is a light path from the straight line to the focusing element and then to the focal line, and a first diaphragm located in the light path and defining a sharp edge in the rays. This embodiment provides a light which has a sharply defined virtual surface which separates lighted areas from areas not lit, and within the lighted areas, provides light from multiple directions to reduce shadowing.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/532,213 US5745176A (en) | 1995-10-12 | 1995-10-12 | Machine-vision illumination system and method for delineating a lighted volume from an unlighted volume |
Publications (1)
Publication Number | Publication Date |
---|---|
TW284854B true TW284854B (en) | 1996-09-01 |
Family
ID=24120844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW084112218A TW284854B (en) | 1995-10-12 | 1995-11-17 | Machine-vision illumination system and method |
Country Status (5)
Country | Link |
---|---|
US (1) | US5745176A (en) |
AU (1) | AU7201996A (en) |
CA (1) | CA2233589C (en) |
TW (1) | TW284854B (en) |
WO (1) | WO1997014031A1 (en) |
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US9052294B2 (en) | 2006-05-31 | 2015-06-09 | The Boeing Company | Method and system for two-dimensional and three-dimensional inspection of a workpiece |
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-
1995
- 1995-10-12 US US08/532,213 patent/US5745176A/en not_active Expired - Lifetime
- 1995-11-17 TW TW084112218A patent/TW284854B/en active
-
1996
- 1996-09-16 WO PCT/US1996/015635 patent/WO1997014031A1/en active Application Filing
- 1996-09-16 CA CA002233589A patent/CA2233589C/en not_active Expired - Fee Related
- 1996-09-16 AU AU72019/96A patent/AU7201996A/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
AU7201996A (en) | 1997-04-30 |
WO1997014031A1 (en) | 1997-04-17 |
US5745176A (en) | 1998-04-28 |
CA2233589A1 (en) | 1997-04-17 |
CA2233589C (en) | 2001-09-04 |
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